You wanted to curl up with your baby, but ended up curling up with Bubba, your new cell mate. As opposed to a beautiful, memorable evening that can launch a relationship worth a thousand tomorrows, you end up in a trauma facility forever recovering from the psychological buggering you endured in jail. You survived Valentine's Day, now there is just one more to go- President's Day. Hopefully your emancipation is through a symbolic, cultural celebration of our foundations of liberty, and not a physical release from jail.
What keeps you separate you from the long arm of the law is probable cause. This is what permits a law enforcement officer to break into your life, investigate, and possibly drag you to jail. Usually it is not what you expect. Please see the next few examples of the unexpected situations that lead drivers into the handcuffs of officers.